A survey of blindness and cataract surgery in Doumen County, China

Ophthalmology. 1999 Aug;106(8):1602-8. doi: 10.1016/S0161-6420(99)90459-1.


Purpose: To assess blindness prevalence and that caused specifically by cataract in rural southern China.

Design: Population-based, cross-sectional study.

Participants: A total of 5342 persons older than 50 years of age.

Methods: Visual acuity and eye examinations were performed in the summer of 1997 in a random sample of villages in Doumen County. Differences in blindness prevalence associated with age, gender, and education were explored using logistic regression. The survey was preceded by a pilot study in which operational methods were refined and quality assurance measures were performed.

Main outcome measures: Distance visual acuity and lens status.

Results: Bilateral blindness (presenting visual acuity < 0.10) was found in 4.37% (95% confidence interval, 3.67%-5.06%). Blindness was associated with increasing age (P < 0.001) and with the lack of education (P < 0.01). Cataract was the principal cause of blindness in at least one eye in 61.5% of blind people, with refractive error responsible for another 10%. An estimated 40% of the cataract blind were operated on; surgical coverage was lowest among the elderly, women, and those without schooling, although not at statistically significant levels.

Conclusions: Despite the increased attention given to eye care in Doumen County, blindness remains a major public health problem. Cataract surgery is reaching fewer than half of those who could benefit from it.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Blindness / epidemiology*
  • Blindness / etiology
  • Cataract / complications
  • Cataract Extraction / statistics & numerical data*
  • China / epidemiology
  • Cross-Sectional Studies
  • Educational Status
  • Female
  • Health Surveys
  • Humans
  • Male
  • Middle Aged
  • Prevalence
  • Rural Population